/***************************************************************************
 *   This file is part of the Lime Report project                          *
 *   Copyright (C) 2015 by Alexander Arin                                  *
 *   arin_a@bk.ru                                                          *
 *                                                                         *
 **                   GNU General Public License Usage                    **
 *                                                                         *
 *   This library is free software: you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation, either version 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
 *                                                                         *
 **                  GNU Lesser General Public License                    **
 *                                                                         *
 *   This library is free software: you can redistribute it and/or modify  *
 *   it under the terms of the GNU Lesser General Public License as        *
 *   published by the Free Software Foundation, either version 3 of the    *
 *   License, or (at your option) any later version.                       *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library.                                      *
 *   If not, see <http://www.gnu.org/licenses/>.                           *
 *                                                                         *
 *   This library is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 ****************************************************************************/
#ifndef LRPAGEDEDIGNITF_H
#define LRPAGEDEDIGNITF_H

#include <QGraphicsScene>
#include <QtXml>

#include "lrpageitemdesignintf.h"
#include "serializators/lrstorageintf.h"
#include "lrbanddesignintf.h"

namespace LimeReport {

    class BaseDesignIntf;
    class ReportEnginePrivate;
    class PropertyChangedCommand;
    class HorizontalLayout;
    class LayoutDesignIntf;

    class CommandIf {
    public:
        virtual ~CommandIf(){}
        typedef QSharedPointer<CommandIf> Ptr;
        virtual bool doIt() = 0;
        virtual void undoIt() = 0;
        virtual void addCommand(CommandIf::Ptr command,bool execute);
    };

    typedef QList<LimeReport::BandDesignIntf*>::const_iterator BandsIterator;

    struct ReportItemPos{
        QString objectName;
        QPointF pos;
    };

    struct ReportItemSize{
        QString objectName;
        QSizeF  size;
    };

    class Projection{
    public:
        Projection(qreal start, qreal end)
            :m_start(start),m_end(end){}
        bool intersect(Projection projection);
        qreal start() const;
        qreal end() const;
    private:
        qreal m_start;
        qreal m_end;
    };

    class ItemProjections{
    public:
        ItemProjections(BaseDesignIntf* item)
            :m_xProjection(item->pos().x(), item->pos().x()+item->width()),
            m_yProjection(item->pos().y(), item->pos().y()+item->height()),
            m_item(item)
        {}
        bool intersect(QRectF rect);
        bool intersect(BaseDesignIntf* item);
        qreal square(QRectF rect);
        qreal square(BaseDesignIntf* item);
        BaseDesignIntf* item(){return m_item;}
    private:
        Projection m_xProjection;
        Projection m_yProjection;
        BaseDesignIntf* m_item;
    };

    class PageDesignIntf : public QGraphicsScene, public ObjectLoadingStateIntf{
        Q_OBJECT
        Q_PROPERTY(QObject* pageItem READ pageItem())
        public:
            friend class PropertyChangedCommand;
            friend class InsertHLayoutCommand;
            enum Orientation {Portrait, Landscape};
            enum PageSize {A4, B5, Letter, Legal, Executive,
                           A0, A1, A2, A3, A5, A6, A7, A8, A9, B0, B1,
                           B10, B2, B3, B4, B6, B7, B8, B9, C5E, Comm10E,
                           DLE, Folio, Ledger, Tabloid, Custom, NPageSize = Custom
                          };

            explicit PageDesignIntf(QObject* parent = 0);
            ~PageDesignIntf();
            void updatePageRect();
            Orientation getOrientation();

            void setPageSize(PageSize sizeType, QSizeF sizeValue=QSizeF());
            PageSize pageSize() const;

            void startInsertMode(const QString& ItemType);
            void startEditMode();

            PageItemDesignIntf *pageItem();
            void setPageItem(PageItemDesignIntf::Ptr pageItem);
            void setPageItems(QList<PageItemDesignIntf::Ptr> pages);
            QList<PageItemDesignIntf::Ptr> pageItems(){return m_reportPages;}

            bool isItemInsertMode();
            ReportEnginePrivate* reportEditor();
            void setReportEditor(ReportEnginePrivate* value){m_reportEditor=value;}

            QStringList possibleParentItems();
            void registerItem(BaseDesignIntf* item);
            void registerBand(BandDesignIntf* band);
            void removeAllItems();

            void setItemMode(BaseDesignIntf::ItemMode state);
            BaseDesignIntf::ItemMode itemMode(){return m_itemMode;}
            BaseDesignIntf* reportItemByName(const QString& name);
            QList<BaseDesignIntf *> reportItemsByName(const QString &name);
            BaseDesignIntf* addReportItem(const QString& itemType, QPointF pos, QSizeF size);
            BaseDesignIntf* addReportItem(const QString& itemType, QObject *owner=0, BaseDesignIntf *parent=0);
            BaseDesignIntf* createReportItem(const QString& itemType, QObject *owner=0, BaseDesignIntf *parent=0);
            void removeReportItem(BaseDesignIntf* item, bool createComand = true);
            CommandIf::Ptr removeReportItemCommand(BaseDesignIntf *item);
            bool saveCommand(CommandIf::Ptr command, bool runCommand = true);

            bool isCanRedo();
            bool isCanUndo();
            bool isHasChanges();

            void reactivatePageItem(PageItemDesignIntf::Ptr pageItem);

            void setSettings(QSettings* settings){ m_settings = settings;}
            QSettings* settings(){ return m_settings;}

            QString genObjectName(const QObject& object);

            void animateItem(BaseDesignIntf* item);            
            void setSelectionRect(QRectF selectionRect);
            void emitRegisterdItem(BaseDesignIntf *item);
            void emitItemRemoved(BaseDesignIntf* item);

            DataSourceManager* datasourceManager();
            bool isSaved(){ return !m_hasHanges;}
            void changeSelectedGrpoupTextAlignPropperty(const bool& horizontalAlign, Qt::AlignmentFlag flag);

            int verticalGridStep() const;
            void setVerticalGridStep(int verticalGridStep);

            int horizontalGridStep() const;
            void setHorizontalGridStep(int horizontalGridStep);

            void beginUpdate(){m_updating = true;}
            bool isUpdating(){return m_updating;}
            void endUpdate();

            void itemMoved(BaseDesignIntf* item);
            bool magneticMovement() const;
            void setMagneticMovement(bool magneticMovement);

            ReportSettings *getReportSettings() const;
            void setReportSettings(ReportSettings *reportSettings);

            void setPropertyToSelectedItems(const char *name, const QVariant &value);

    protected:

            virtual void keyPressEvent(QKeyEvent *event);
            virtual void keyReleaseEvent(QKeyEvent *event);
            virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
            virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
            virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);

            virtual void dragEnterEvent(QGraphicsSceneDragDropEvent *event);
            virtual void dragMoveEvent(QGraphicsSceneDragDropEvent *);
            virtual void dragLeaveEvent(QGraphicsSceneDragDropEvent *event);
            virtual void dropEvent(QGraphicsSceneDragDropEvent *event);

            LimeReport::BandDesignIntf::BandsType findPriorType(LimeReport::BandDesignIntf::BandsType bandType);
            BaseDesignIntf *findDestObject(BaseDesignIntf *item);

            bool isExistsObjectName (const QString& objectName, QList<QGraphicsItem *> &itemsList) const;
            QRectF getRectByPageSize(PageSize pageSize);

            bool isLoading();
            void objectLoadStarted();
            void objectLoadFinished();

            HorizontalLayout* internalAddHLayout();
            QPointF placePosOnGrid(QPointF point);
            QSizeF placeSizeOnGrid(QSizeF size);
    signals:
            void geometryChanged(QRectF newGeometry);
            void insertModeStarted();
            void itemInserted(LimeReport::PageDesignIntf* report, QPointF pos, const QString& ItemType);
            void itemInsertCanceled(const QString& ItemType);
            void itemSelected(LimeReport::BaseDesignIntf *item);
            void multiItemsSelected(QList<QObject*>* objectsList);
            void miltiItemsSelectionFinished();
            void commandHistoryChanged();
            void itemPropertyChanged(const QString& objectName, const QString& propertyName, const QVariant& oldValue, const QVariant& newValue);
            void itemAdded(LimeReport::PageDesignIntf* page, LimeReport::BaseDesignIntf* item);
            void itemRemoved(LimeReport::PageDesignIntf* page, LimeReport::BaseDesignIntf* item);
            void bandAdded(LimeReport::PageDesignIntf* page, LimeReport::BandDesignIntf* band);
            void bandRemoved(LimeReport::PageDesignIntf* page, LimeReport::BandDesignIntf* band);
            void pageUpdateFinished(LimeReport::PageDesignIntf* page);
        public slots:
            BaseDesignIntf* addBand(const QString& bandType);
            BaseDesignIntf* addBand(BandDesignIntf::BandsType bandType);
            void removeBand(LimeReport::BandDesignIntf* band);
            void bandGeometryChanged(QObject* object, QRectF newGeometry, QRectF oldGeometry);
            void bandPosChanged(QObject* object, QPointF newPos, QPointF oldPos);
            void slotUpdateItemSize();
            void undo();
            void redo();
            void copy();
            void paste();
            void deleteSelected();
            void cut();
            void setToSaved();
            void bringToFront();
            void sendToBack();
            void alignToLeft();
            void alignToRigth();
            void alignToVCenter();
            void alignToTop();
            void alignToBottom();
            void alignToHCenter();
            void sameWidth();
            void sameHeight();
            void addHLayout();
            void setFont(const QFont &font);
            void setTextAlign(const Qt::Alignment& alignment);
            void setBorders(const BaseDesignIntf::BorderLines& border);
        private slots:
            void slotPageGeometryChanged(QObject*, QRectF, QRectF );
            void slotItemPropertyChanged(QString propertyName, const QVariant &oldValue, const QVariant &newValue);
            void slotItemPropertyObjectNameChanged(const QString& oldName, const QString& newName);
            void bandDeleted(QObject* band);
            void slotPageItemLoaded(QObject *);
            void slotSelectionChanged();
            void slotAnimationStoped(QObject *animation);
        private:
            template <typename T>
            BaseDesignIntf* internalAddBand(T bandType);
            void finalizeInsertMode();
            void saveSelectedItemsPos();
            void saveSelectedItemsGeometry();
            void checkSizeOrPosChanges();
            CommandIf::Ptr createChangePosCommand();
            CommandIf::Ptr createChangeSizeCommand();
            void saveChangeProppertyCommand(const QString& objectName, const QString& propertyName, const QVariant& oldPropertyValue, const QVariant& newPropertyValue);
            void changeSelectedGroupProperty(const QString& name,const QVariant& value);

        private:
            enum JoinType{Width, Height};
            PageSize m_pageSize;
            QSizeF m_pageSizeValue;
            Orientation m_orientation;
            QRectF m_geometry;
            LimeReport::PageItemDesignIntf::Ptr m_pageItem;
            QList<PageItemDesignIntf::Ptr> m_reportPages;
            ReportEnginePrivate* m_reportEditor;
            bool m_insertMode;
            QGraphicsItem * m_itemInsertRect;
            QString m_insertItemType;
            BaseDesignIntf::ItemMode m_itemMode;
            QGraphicsRectItem* m_cutterBorder;
            QGraphicsRectItem* m_pageRect;
            QVector<CommandIf::Ptr> m_commandsList;
            QVector<ReportItemPos> m_positionStamp;
            QVector<ReportItemSize> m_geometryStamp;
            BaseDesignIntf* m_firstSelectedItem;
            int m_currentCommand;
            bool m_changeSizeMode;
            bool m_changePosMode;
            bool m_changePosOrSizeMode;
            bool m_executingCommand;
            bool m_hasHanges;
            bool m_isLoading;
            bool m_executingGroupCommand;
            QSettings* m_settings;
            QList<QObject*> m_animationList;
            QPointF m_startSelectionPoint;
            QGraphicsRectItem* m_selectionRect;
            int m_verticalGridStep;
            int m_horizontalGridStep;
            bool m_updating;
            int m_currentObjectIndex;
            bool m_multiSelectStarted;
            QList<ItemProjections> m_projections;
            BaseDesignIntf*  m_movedItem;
            BaseDesignIntf*  m_movedItemContainer;
            BaseDesignIntf*  m_joinItem;
            JoinType         m_joinType;
            bool             m_magneticMovement;
            ReportSettings*  m_reportSettings;
    };

    class AbstractPageCommand : public CommandIf{
    public:
        void setPage(PageDesignIntf* value){m_page = value;}
        PageDesignIntf* page(){return m_page;}
    private:
       PageDesignIntf* m_page;
    };

    class InsertHLayoutCommand : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create(PageDesignIntf* page);
        bool doIt();
        void undoIt();
    private:
        InsertHLayoutCommand(){}
    private:
        QString m_layoutName;
        QString m_oldParentName;
        QMap<QString,QPointF> m_elements;
    };

    class InsertItemCommand : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create(PageDesignIntf* page, const QString& itemType, QPointF pos, QSizeF size);
        bool doIt();
        void undoIt();
        void setPos(QPointF& value){m_pos = value;}
        QPointF pos(){return m_pos;}
        void setSize(QSizeF& value){m_size=value;}
        QSizeF size(){return m_size;}
        void setType(const QString& value){m_itemType=value;}
    private:
        InsertItemCommand(){}
    private:
        QPointF m_pos;
        QSizeF m_size;
        QString m_itemType;
        QString m_itemName;
    };

    class InsertBandCommand : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create(PageDesignIntf* page,const QString& bandName);
        bool doIt();
        void undoIt();
    private:
        BandDesignIntf::BandsType m_bandType;
        QString m_bandName;
        QString m_parentBandName;
    };

    class DeleteItemCommand : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create(PageDesignIntf* page, BaseDesignIntf* item);
        bool doIt();
        void undoIt();
        void setType(const QString& value){m_itemType=value;}
        void setXml(const QString& value){m_itemXML=value;}
        void setItem(BaseDesignIntf* value);
    private:
        QString m_itemXML;
        QString m_itemType;
        QString m_itemName;
        QString m_layoutName;
    };

    class DeleteLayoutCommand : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create(PageDesignIntf* page, LayoutDesignIntf* item);
        bool doIt();
        void undoIt();
    protected:
        void setItem(BaseDesignIntf* item);
    private:
        QStringList m_childItems;
        QString m_itemXML;
        QString m_itemType;
        QString m_itemName;
    };


    class PasteCommand : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create(PageDesignIntf* page, const QString& itemsXML, BaseDesignIntf *parent);
        bool doIt();
        void undoIt();
    protected:
        void setItemsXML(const QString& itemsXML);
        void setParent(BaseDesignIntf* parent){m_parentItemName = parent->objectName();}
        bool insertItem(ItemsReaderIntf::Ptr reader);
    private:
        QString m_itemsXML;
        QString m_parentItemName;
        QVector<QString> m_itemNames;
    };

    class CutCommand : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create(PageDesignIntf* page);
        bool doIt();
        void undoIt();
        void setXML(const QString& value){m_itemsXML=value;}
    private:
        QString m_itemsXML;
        QVector<QString> m_itemNames;
    };

    class PosChangedCommand : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create(PageDesignIntf* page, QVector<ReportItemPos>& oldPos, QVector<ReportItemPos>& newPos);
        bool doIt();
        void undoIt();
    private:
        QVector<ReportItemPos> m_oldPos;
        QVector<ReportItemPos> m_newPos;
    };

    class SizeChangedCommand : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create(PageDesignIntf* page, QVector<ReportItemSize>& oldSize, QVector<ReportItemSize>& newSize);
        bool doIt();
        void undoIt();
    private:
        QVector<ReportItemSize> m_oldSize;
        QVector<ReportItemSize> m_newSize;
    };

    class PropertyChangedCommand : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create(PageDesignIntf* page, const QString& objectName, const QString& propertyName, const QVariant& oldValue, const QVariant& newValue);
        bool doIt();
        void undoIt();
    private:
        QString     m_objectName;
        QString     m_propertyName;
        QVariant    m_oldValue;
        QVariant    m_newValue;
    };

    class PropertyObjectNameChangedCommand : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create(PageDesignIntf* page, const QString &oldValue, const QString &newValue);
        bool doIt();
        void undoIt();
    private:
        QString m_oldName;
        QString m_newName;
    };

    class PropertyItemAlignChangedCommand : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create(PageDesignIntf* page, const QString& objectName, BaseDesignIntf::ItemAlign oldValue, BaseDesignIntf::ItemAlign newValue);
        bool doIt();
        void undoIt();
    private:
        QString m_objectName;
        QString m_propertyName;
        BaseDesignIntf::ItemAlign m_oldValue;
        BaseDesignIntf::ItemAlign m_newValue;
        QPointF m_savedPos;
    };

    class CommandGroup : public AbstractPageCommand{
    public:
        static CommandIf::Ptr create();
        bool doIt();
        void undoIt();
        void addCommand(CommandIf::Ptr command,bool execute);
    private:
        QList<CommandIf::Ptr> m_commands;
    };

}
#endif //LRPAGEDEDIGNITF_H
